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Adsorption

, Volume 23, Issue 4, pp 551–561 | Cite as

An analysis of the effect of the additional activation process on the formation of the porous structure and pore size distribution of the commercial activated carbon WG-12

  • Mirosław KwiatkowskiEmail author
  • Joanna Sreńscek-Nazzal
  • Beata Michalkiewicz
Article

Abstract

The paper presents the results of research into the effects of the additional activation process of the commercial activated carbon WG-12 with KOH, ZnCl2, KOH/ZnCl2 and K2CO3 as activating agents on the formation of the porous structure and the adsorptive properties of that material. The numerical analyses were carried out on the basis of the isotherms of nitrogen adsorption with the use of the method based on the Brunauer-Emmett-Teller, the Dubinin-Radushkevich equations, the non-local and the quenched solid density functional theories as well as the LBET method with the unique fast multivariate procedure of porous structure identification and the new LBET class adsorption models. Also, the research in question yielded information regarding the usefulness of the said methods of carbonaceous adsorbent porous structure description for practical technological applications and scientific research, as well as the possibilities to make practical use of the research results.

Keywords

Adsorption Porous structure Chemical activation Active carbons WG-12 NLDFT QSDFT LBET 

List of symbols

mA

The total adsorption (mmol/g), m hA - the number of primary sites at the adsorbate pores

VhA

The volume of a space accessible for the first layer adsorption (cm3/g)

θkj

The coverage ratio of j th layer at k th type clusters

θ

The coverage ratio of layers n >1

π

The relative pressure

α

The geometrical parameter of the microporous structure

β

The average number of sites provided by (n-1)-th layer for the n-th layer, n 2,k, averaged over all clusters

QA and QC

The adsorption energies at the first (Q A ) and higher layers (Q C ) (J/mol)

R

The gas constant

T

Temperature

BAk, Bfk

The energy parameters

Notes

Acknowledgements

The research is led within the AGH University of Science and Technology Grant No. 11.11.210.217.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Mirosław Kwiatkowski
    • 1
    Email author
  • Joanna Sreńscek-Nazzal
    • 2
  • Beata Michalkiewicz
    • 2
  1. 1.Faculty of Energy and FuelsAGH University of Science and TechnologyKrakówPoland
  2. 2.Institute of Chemical and Environment EngineeringWest Pomeranian University of TechnologySzczecinPoland

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